<template>
  <div>
    <header class="site-header jumbotron">
      <div class="container">
        <div class="row">
          <div class="col-xs-12">
            <h1>请发表对Vue的评论</h1>
          </div>
        </div>
      </div>
    </header>
    <div class="container">
      <Add :addComment="addComment"/>
      <!--标识将comments变量传递过去-->
      <List :comments="comments" :deleteComment="deleteComment"/>
    </div>
  </div>
</template>

<script>
import Add from './components/Add.vue'
import List from './components/List.vue'

export default {
  name: "App",
  data() {
    return { // 数据在哪个组件，更新数据的行为（方法）就应该定义在哪个组件
      comments: [
        {
          name: 'Bob',
          content: 'Vue 还不错'
        },
        {
          name: 'Cat',
          content: 'Vue so easy'
        },
        {
          name: 'Ocean',
          content: 'Vue 比较难'
        },
      ]
    }
  },
  methods: {
    addComment(comment) {
      this.comments.unshift(comment)
    },
    deleteComment(index) {
      this.comments.splice(index, 1)
    }
  },
  components: {
    Add, List
  }
}
</script>

<style scoped>

</style>
